After returnig from the Umar Hills where I did some questing, I went back to the Copper Coronet to sell some loot etc. and found that Lord Jierdan has gone away. I did not talk to him yet, so his quest has not started yet is there any other way in the game that allows me access to the windspear hills? Is there a way in Shadowkeeper to retroactively begin the quest?
you might want to try looking up his CLUA code in the creature list of shadowkeeper, then summoning him using the console in game. the code would be in the CLUA commands sticky on this site. ive found that method useful in spawning people who havnt done automatically as they should.